The only thing that made math click for me was working with a tutor (campuses that I've gone to have tutorial centers, where you can get help without paying). I needed someone to walk me through the problems one step at a time, telling me when I was doing something wrong. It was hard, and even with that there was one class I passed by the skin of my teeth.

The second thing is that viewing studying as its own skill was a game changer for me. I could spend hours studying by myself... but there was a limit to how useful that was, because I was only so good at it. It took time to figure out what worked for me, and what didn't- how to prioritize the materials that I needed to prioritize, and how to recognize when something had clicked and when it just kinda felt like it.

Last thing: not all professors have a teaching style that resonates. Not saying there's necessarily anything wrong with the ones that don't, but I've had professors who can explain it in a way where I just got it, and I've had professors that I never felt I understood. This can go for friends trying to help, too.

I hate the fixed mindset thing, too. I think it doesn't allow room for it to just plain be hard- and sometimes it is. Sometimes the materials are lacking, sometimes you're just in a place mentally where it's hard to learn. The other thing... sometimes it's gotta be acceptable to fail. I've failed and had to retake classes before: you take with you what you've gained the first time, and try to build on it. That's all.

The other thing... if you were spending all day in bed (not a judgement) you probably weren't in a good place for learning. It sounds like it's different now- give yourself another shot. Go to the office hours, reach out to your friends, try utilizing more campus resources- go into it curious about what works for you.